(19)

(11)

EP 2 453 802 A2

(12)

(88) Date of publication A3: 28.04.2011 (43) Date of publication: 23.05.2012 Bulletin 2012/21 (21) Application number: 10800516.6 (22) Date of filing: 15.07.2010

(51) International Patent Classification (IPC):  A61B 8/00(2006.01) G01N 29/26(2006.01) (86) International application number: PCT/US2010/042066 (87) International publication number: WO 2011/008914 (20.01.2011 Gazette 2011/03)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 15.07.2009 US 503438 (71) Applicant: National Semiconductor Corporation Santa Clara, CA 95051 (US)	(72) Inventors: MA, Wei San Ramon CA 94582 (US) ZHANG, Zhenyong Sunnyvale CA 94089 (US) WU, Jian-Yi San Ramon CA 94582 (US) (74) Representative: Holt, Michael  Texas Instruments Limited European Patents Department 800 Pavilion Drive Northampton NN4 7YL Northampton NN4 7YL (GB)